I have been using a C-pen 3.5 for collecting printed notes that can be stored for assignments. It works well with Bluetooth and a Windows computer – You can run the pen over the print quite quickly and it will appear in whatever document you are using.
I have found it works best on high contrast black print on white paper or vice versa. The smaller the font the slower you need to scan. If you use a ruler or hard edge against the side of the pen you get a more accurate result and can scan across the page at a faster rate.
Luke – ECS